4″ x 4″ x 7 gauge (.188″ wall) square steel tubing is manufactured from ASTM A500 steel, a cold-formed carbon steel specification designed for heavy-duty structural applications. This hollow structural section (HSS) features a large square profile with a thick wall, providing excellent strength, rigidity, and durability for demanding construction and industrial projects. Typically produced in Grade B, it offers superior weldability, precise dimensional consistency, and reliable performance in high-stress environments.

Applications:
4″ square steel tubing (7ga) is commonly used in:
• Heavy-duty structural frames, supports, and columns
• Industrial machinery bases and equipment supports
• Gates, railings, and security structures
• Trailer frames and automotive fabrication
• Load-bearing fabrication projects
• Structural bracing in commercial and industrial construction

Advantages:
• High strength: Thick wall (.188″) supports heavy loads and resists deformation
• Durable construction: Ideal for demanding structural and industrial applications
• Excellent weldability: Compatible with MIG, TIG, and stick welding
• Versatile fabrication: Can be cut, drilled, and modified for custom projects
• Consistent quality: Manufactured for precise dimensions and reliable fit

Summary:
The 4″ x 4″ x 7 gauge ASTM A500 square steel tube is a heavy-duty and dependable structural material designed for reinforced frames, supports, and load-bearing applications. Its thick wall, strength, and weldability make it ideal for industrial and construction projects requiring durability and performance.